CN109361320A - A kind of multi-element resonant converter - Google Patents

A kind of multi-element resonant converter Download PDF

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Publication number
CN109361320A
CN109361320A CN201811414160.5A CN201811414160A CN109361320A CN 109361320 A CN109361320 A CN 109361320A CN 201811414160 A CN201811414160 A CN 201811414160A CN 109361320 A CN109361320 A CN 109361320A
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China
Prior art keywords
switch
transformer
circuit
switching tube
inductance
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Pending
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CN201811414160.5A
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Chinese (zh)
Inventor
赵清林
刘威
李昆仑
王德玉
杨秋霞
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Yanshan University
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Yanshan University
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Priority to CN201811414160.5A priority Critical patent/CN109361320A/en
Publication of CN109361320A publication Critical patent/CN109361320A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a kind of multi-element resonant converters, comprising: DC bus input circuit, square-wave generator, resonance circuit, transformer, current rectifying and wave filtering circuit, load；The output end of the DC bus input circuit is connected with the input terminal of the square-wave generator；The output end of the square-wave generator is connected with the input terminal of the resonance circuit, and the resonance circuit generates the resonance signal of saddle wave, and output end is connected with the primary side of the transformer；The secondary side of the transformer is connected with the input terminal of the current rectifying and wave filtering circuit；The output end of the current rectifying and wave filtering circuit is connected with the load；The switching tube of multi-element resonant converter of the invention achievable no-voltage in entire working range and under loading condition is open-minded, and gain ranging is wide, can transmit energy using fundamental wave and triple-frequency harmonics simultaneously.

Description

A kind of multi-element resonant converter
Technical field
The present invention relates to converters technical field more particularly to a kind of multi-element resonant converters.
Background technique
With the development of power electronics technology, the DC converter of wide gain in portable device, electric car is vehicle-mounted fills There is very important application in the fields such as motor, energy-storage system, communication power supply.
LLC resonant converter has Natural Soft-Switching characteristic, and it is open-minded that primary side switch pipe is able to achieve no-voltage, secondary side diode It is being able to achieve zero-current switching lower than resonance frequency, the realization of Sofe Switch under the premise of guaranteed efficiency so that can be improved switch The working frequency of pipe；In addition the leakage inductance of transformer can partly or entirely serve as resonant inductance, facilitate magnetic integrated, further improve Power density.
The common modulation scheme of LLC converter is pulse frequency modulated.When switching frequency is lower than resonant frequency point, transformation Device gain responds comparatively fast with the variation of frequency, but when being higher than resonant frequency point, as frequency increases, gain decline is slow, When the frequency of adjusting is excessively high, loss be will increase, and be unfavorable for efficiency operation, illustrate that LLC resonant converter is difficult in wide gain It is taken into account between high efficiency.Therefore, the hybrid control strategy of LLC converter is proposed in the prior art, is higher than resonant frequency point and is used Phase shifting control is lower than resonant frequency point frequency control, realizes wider voltage gain, but control mode is complex, switches Trouble.In order to overcome LLC converter to be difficult the shortcomings that taking into account between wide gain and high efficiency, need to explore a kind of new multicomponent Part controlled resonant converter topological structure.
Summary of the invention
In view of the above technical problems, the purpose of the present invention is to provide a kind of new multicomponent part controlled resonant converter, work exists Sofe Switch state, working range is wide, high-efficient.
To achieve the above object, the present invention is realized according to following technical scheme:
A kind of multi-element resonant converter characterized by comprising DC bus input circuit, square-wave generator, resonance Circuit, transformer, current rectifying and wave filtering circuit, load, wherein the output end of the DC bus input circuit and the square wave occur The input terminal of device is connected, and the output end of the square-wave generator is connected with the input terminal of the resonance circuit, the resonance circuit The resonance signal of saddle wave is generated, the output end of the resonance circuit is connected with the primary side of the transformer, the transformer Secondary side is connected with the input terminal of the current rectifying and wave filtering circuit, and the output end of the current rectifying and wave filtering circuit is connected with the load.
In above-mentioned technical proposal, the square-wave generator uses the bridge circuit of full bridge inverter, full bridge inverter The square-wave signal duty ratio of generation is 50%, and the full bridge inverter includes first switch tube S1, second switch S2, third Switching tube S3, the 4th switching tube S4, the first switch tube S1Drain electrode and the third switching tube S3Drain electrode be connected, it is described First switch tube S1Source electrode be connected to the second switch S2Drain electrode, the third switching tube S3Source electrode be connected to The 4th switching tube S4Drain electrode, second switch S2Source electrode be connected in the 4th switching tube S4Source electrode.
In above-mentioned technical proposal, the first switch tube S1, second switch S2, third switching tube S3And the 4th switch Pipe S4Using MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) switching tube or IGBT ((Insulated Gate Bipolar Transistor)) switching tube.
In above-mentioned technical proposal, the resonance circuit includes main inductance Lm, resonant inductance Lr, trapper, the trapper One end is connected to the square-wave generator first switch tube S1Source electrode and second switch S2Drain electrode, the other end of trapper It is connected to main inductance LmOne end and transformer T primary side winding NpSame Name of Ends, main inductance LmThe other end be connected to transformer T Primary side winding NpNon-same polarity and resonant inductance LrOne end, resonant inductance LrThe other end be connected to third switching tube S3's Source electrode and the 4th switching tube S4Drain electrode.
In above-mentioned technical proposal, the square-wave generator uses the bridge circuit of half-bridge inversion circuit, half-bridge inversion circuit The square-wave signal duty ratio of generation is 50%, and the half-bridge inversion circuit includes first switch tube S1, second switch S2, first Switching tube S1Source electrode be connected in second switch S2Drain electrode.
In above-mentioned technical proposal, the first switch tube S1, second switch S2It is switched using switch mosfet pipe or IGBT Pipe.
In above-mentioned technical proposal, the resonance circuit includes main inductance Lm, resonant inductance Lr, trapper, the transformer T Including primary side winding NpWith vice-side winding Ns, one end of trapper is connected to the square-wave generator first switch tube S1Source electrode With second switch S2Drain electrode, the other end of trapper is connected to main inductance LmOne end and transformer T primary side winding NpIt is same Name end, main inductance LmThe other end be connected in transformer T primary side winding NpNon-same polarity and resonant inductance LrOne end, resonance electricity Feel LrThe other end be connected in and second switch S2Source electrode.
In above-mentioned technical proposal, the trapper includes series resonance slot and trapper capacitor Cp, series resonance slot and fall into Wave device capacitor CpIt is connected in parallel, the series resonance slot includes resonant capacitance Cr, trapper inductance Lp, the resonant capacitance CrWith Trapper inductance LpIt is connected in series.
In above-mentioned technical proposal, the current rectifying and wave filtering circuit includes rectification circuit and filter capacitor Co, the rectification circuit By first diode D1, the second diode D2, third diode D3, the 4th diode D4It constitutes, first diode D1Anode and Second diode D2Cathode be connected in the transformer T vice-side winding NsSame Name of Ends, first diode D1Cathode be connected in the three or two Pole pipe D3Cathode, output filter capacitor CoOne end and load RoOne end, transformer T vice-side winding NsNon-same polarity is connected in Third diode D3Anode and the 4th diode D4Cathode, the 4th diode D4Anode be connected in the second diode D2Sun Pole, output filter capacitor CoThe other end and load RoThe other end.
Compared with the prior art, the invention has the following advantages:
(1) voltage of all switching devices is all directly clamped by input voltage or output voltage, switching device voltage stress It is low；
(2) all switching devices can realize Sofe Switch in entire working range and full-load range, and conversion efficiency is high；
(3) transformer leakage inductance is utilized effectively, and there is no circulation or due to voltage spikes problems caused by leakage inductance；
(4) converter can transmit power using triple-frequency harmonics, high to the utilization rate of energy；
(5) gain ranging that converter is able to achieve is wide, can realize that gain is zero under smaller switching frequency, is suitble to width gain Occasion.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the electrical block diagram of multi-element resonant converter of the present invention；
Fig. 2 is the circuit diagram of multi-element resonant converter embodiment 1 of the present invention；
Fig. 3 is the main waveform diagram of multi-element resonant converter embodiment 1 of the present invention；
Fig. 4 (a)-Fig. 4 (e) is equivalent circuit diagram of the multi-element resonant converter embodiment 1 of the present invention in each switch mode；
Fig. 5 is the gain curve figure of multi-element resonant converter embodiment 1 of the present invention；
Fig. 6 is the working waveform figure that multi-element resonant converter embodiment 1 of the present invention works in 80kHz switching frequency；
Fig. 7 is the working waveform figure that multi-element resonant converter embodiment 1 of the present invention works in 132kHz switching frequency；
Wherein, the designation in the figures above: A, B, C, D are bridge arm midpoint；VinFor input source；S1、S2、S3、S4Respectively For the first, second, third, fourth switching tube；CrFor resonant capacitance；LrFor resonant inductance；CpFor trapper capacitor；LpFor trap Device inductance；LmFor main inductance；T is transformer；D1、D2、D3、D4Respectively the first, second, third, fourth diode；CoFor output Filter capacitor；RoFor load；NpAnd NsThe respectively primary side winding and vice-side winding of transformer T；imFor main inductance LmElectric current；ip For primary current；isFor secondary current；VoFor output voltage；VmFor main inductance LmThe voltage at both ends；VABFor A, B point-to-point transmission voltage； VCDFor C, D point-to-point transmission voltage；V1For first switch tube S1Both end voltage；t0、t1、t2、t3、t4、t5、t6、t7、t8、t9、t10For when Between.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.
In being described below, for illustration and not for limitation, such as particular switch pipe, driving method etc are proposed Details, to understand thoroughly the present invention.However, it will be clear to one skilled in the art that in other realities without these details It applies and the present invention also may be implemented in example.
Embodiment 1
The embodiment of the present invention 1 is described in detail with reference to the accompanying drawing.
Attached drawing 2 is the circuit diagram of multi-element resonant converter embodiment 1 of the present invention, and the multicomponent as shown in the figure is humorous Vibration converter includes DC bus input circuit, square-wave generator, resonance circuit, transformer, current rectifying and wave filtering circuit, load, Described in the output end of DC bus input circuit be connected with the input terminal of the square-wave generator, the square-wave generator it is defeated Outlet is connected with the input terminal of the resonance circuit, and the resonance circuit generates the resonance signal of saddle wave, the resonance circuit Output end be connected with the primary side of the transformer, the secondary side of the transformer and the input terminal phase of the current rectifying and wave filtering circuit Even, the output end of the current rectifying and wave filtering circuit is connected with the load.
The square-wave generator uses the bridge circuit of full bridge inverter, and the square-wave signal that full bridge inverter generates accounts for For sky than being 50%, the full bridge inverter includes first switch tube S1, second switch S2, third switching tube S3, the 4th switch Pipe S4, the first switch tube S1Drain electrode and the third switching tube S3Drain electrode be connected, the first switch tube S1Source Pole is connected to the second switch S2Drain electrode, the third switching tube S3Source electrode be connected to the 4th switching tube S4's Drain electrode, second switch S2Source electrode be connected in the 4th switching tube S4Source electrode.
Wherein, in above scheme of the invention, first switch tube S1, second switch S2, third switching tube S3And the 4th Switching tube S4Using switch mosfet pipe or IGBT switching tube.
The resonance circuit includes main inductance Lm, resonant inductance Lr, trapper, one end of the trapper is connected to described Square-wave generator first switch tube S1Source electrode and second switch S2Drain electrode, the other end of trapper is connected to main inductance Lm One end and transformer T primary side winding NpSame Name of Ends, main inductance LmThe other end be connected to transformer T primary side winding NpIt is non- Same Name of Ends and resonant inductance LrOne end, resonant inductance LrThe other end be connected to third switching tube S3Source electrode and the 4th switch Pipe S4Drain electrode.
In above scheme of the invention, first switch tube S1, second switch S2It is switched using switch mosfet pipe or IGBT Pipe.
Wherein the trapper includes series resonance slot and trapper capacitor Cp, series resonance slot and trapper capacitor CpAnd Connection connection, the series resonance slot includes resonant capacitance Cr, trapper inductance Lp, the resonant capacitance CrWith trapper inductance Lp It is connected in series.
Main inductance L of the inventionmIt is replaced by the magnetizing inductance of the transformer T.The resonant inductance LrPartly or entirely by The leakage inductance of the transformer T replaces.
The current rectifying and wave filtering circuit includes rectification circuit and filter capacitor Co, the rectification circuit is by first diode D1, Two diode D2, third diode D3, the 4th diode D4It constitutes, first diode D1Anode and the second diode D2Cathode It is connected in the transformer T vice-side winding NsSame Name of Ends, first diode D1Cathode be connected in third diode D3Cathode, output Filter capacitor CoOne end and load RoOne end, transformer T vice-side winding NsNon-same polarity is connected in third diode D3Anode With the 4th diode D4Cathode, the 4th diode D4Anode be connected in the second diode D2Anode, output filter capacitor Co's The other end and load RoThe other end.
Multi-element resonant converter embodiment of the present invention uses following control program: described first, second, third, 4th switching tube S1、S2、S3、S4Switching frequency it is equal, first switch tube S1, third switching tube S3Switching signal respectively with Two switching tube S2, the 4th switching tube S4Switching signal it is complementary, and duty ratio is 0.5, first switch tube S1With the 4th switching tube S4It simultaneously turns on, simultaneously turns off, second switch S2With third switching tube S3It simultaneously turns on, simultaneously turns off.In the specific implementation, First switch tube S1With second switch S2Switching signal between must be provided with reasonable dead time to avoid occur bridge arm it is straight It is logical, third switching tube S3With the 4th switching tube S4Switching signal between must be provided with reasonable dead time to avoid occur bridge Arm is straight-through.By adjusting the first, second, third, fourth switching tube S1、S2、S3、S4Switching frequency adjust output voltage.
Attached drawing 3 is the main waveform diagram of multi-element resonant converter embodiment 1 of the present invention, and the converter is switched at half 5 kinds of operation modes are shared in period.Do following hypothesis before analysis: (1) converter is in steady operational status；(2) all electricity Sense, capacitor and transformer are ideal element；(3) filter capacitor is sufficiently large, ignores output voltage ripple.Its each switch mode work It is described as follows as situation.
1 [t of operating mode0, t1]: switching tube S1And S4It is in the conductive state, exciting current imIn t0Moment is become just by negative, secondary Side diode D1And D4Conducting, main inductance are clamped by output voltage, primary side Lr、Cr、LpAnd CpCommon resonance, power supply is by energy from original While load is transmitted to, referring to attached drawing 4 (a).
2 [t of operating mode1, t2]: switching tube S1And S4It tends to remain on, in t1Moment, primary current ipEqual to excitation electricity Flow im, in this stage Lr、Cr、Lp、CpAnd LmCommon resonance, transformer secondary side current isIt is reduced to 0, in this way output rectifying tube D1With D4ZCS shutdown may be implemented.The separation of former pair side, primary side does not transmit energy to secondary side, referring to attached drawing 4 (b).
3 [t of operating mode2, t3]: in t2Moment, S1And S4Shutdown, primary side resonance current start to S2And S3Parasitic capacitance S is given in electric discharge1And S4Parasitic capacitance charging, arrive t3Moment S2And S3Parasitic capacitance discharge both end voltage be reduced to 0, S1And S4's Parasitic capacitance rises to Vin, referring to attached drawing 4 (c).
4 [t of operating mode3, t4]: in t3Moment, S2And S3The voltage at both ends is reduced to 0, open-minded during this working condition Switching tube S2And S3, it can be achieved that ZVS, secondary side diode D2And D3Conducting, ipGradually it is kept to 0, isReversely gradually increase.Power supply will Amount is transmitted to load from primary side, referring to attached drawing 4 (d).
5 [t of operating mode4, t5]: from t4Moment, ipIt is reversely gradually increased from 0, imAlso it is gradually reduced, reaches t5When It carves, imIt is reduced to 0, primary side Lr、Cr、LpAnd CpCommon resonance, it is since fundamental wave and triple-frequency harmonics superposition cause that saddle, which is presented, in electric current , secondary side diode D at this time2And D3Conducting, energy is transmitted to load from primary side by power supply, referring to attached drawing 4 (e).
The above-mentioned course of work is summarized it is found that all switching tubes of the converter can realize that no-voltage is open-minded, diode can be real Existing zero-current switching, is not present diode reverse recovery problem, therefore, all switching devices are all Sofe Switch working conditions.
Main inductance L in the present embodimentmIt is replaced by the magnetizing inductance of transformer T.Resonant inductance LrPartly or entirely by transformer The leakage inductance of T replaces.Relevant parameter is: Vin=400V, resonant capacitance Cr=14.97nF, resonant inductance Lr=47.01uH, trap Device capacitor Cp=8.98nF, trapper inductance Lp=112.8uH, main inductance Lm=235uH.
Attached drawing 5 is the gain curve figure of multi-element resonant converter embodiment 1 of the present invention, it can be seen from the figure that returning When one change frequency is greater than 1, the gain of multi-element resonant converter of the present invention is obvious as the increase of frequency declines, this is trapper It is influenced caused by transducer gain.When normalized frequency is equal to 2, trap impedance is infinitely great, is equivalent to open circuit, therefore gain It is reduced to zero.When normalized frequency is equal to 3, gain 1, therefore converter can transmit energy using triple-frequency harmonics.
The work wave of Fig. 6 is the present embodiment switching frequency when being 80kHz multi-element resonant converter, it can be seen that resonance Current waveform is in saddle wave, output voltage 250V.
The work wave of Fig. 7 is the present embodiment switching frequency when being 132kHz multi-element resonant converter, it can be seen that humorous The current waveform that shakes is in saddle wave, output voltage 50.67V.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.

Claims (9)

1. a kind of multi-element resonant converter characterized by comprising DC bus input circuit, square-wave generator, resonance electricity Road, transformer, current rectifying and wave filtering circuit, load, wherein the output end of the DC bus input circuit and the square-wave generator Input terminal be connected, the output end of the square-wave generator is connected with the input terminal of the resonance circuit, resonance circuit production The resonance signal of raw saddle wave, the output end of the resonance circuit are connected with the primary side of the transformer, the pair of the transformer Side is connected with the input terminal of the current rectifying and wave filtering circuit, and the output end of the current rectifying and wave filtering circuit is connected with the load.
2. multi-element resonant converter according to claim 1, which is characterized in that the square-wave generator is inverse using full-bridge The bridge circuit on power transformation road, the square-wave signal duty ratio that full bridge inverter generates are 50%, and the full bridge inverter includes First switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4, the first switch tube S1Drain electrode and institute State third switching tube S3Drain electrode be connected, the first switch tube S1Source electrode be connected to the second switch S2Drain electrode, The third switching tube S3Source electrode be connected to the 4th switching tube S4Drain electrode, second switch S2Source electrode be connected in the 4th Switching tube S4Source electrode.
3. multi-element resonant converter according to claim 2, which is characterized in that the first switch tube S1, second switch Pipe S2, third switching tube S3And the 4th switching tube S4Using switch mosfet pipe or IGBT switching tube.
4. multi-element resonant converter according to claim 3, which is characterized in that the resonance circuit includes main inductance Lm、 Resonant inductance Lr, trapper, one end of the trapper is connected to the square-wave generator first switch tube S1Source electrode and second Switching tube S2Drain electrode, the other end of trapper is connected to main inductance LmOne end and transformer T primary side winding NpSame Name of Ends, Main inductance LmThe other end be connected to transformer T primary side winding NpNon-same polarity and resonant inductance LrOne end, resonant inductance Lr The other end be connected to third switching tube S3Source electrode and the 4th switching tube S4Drain electrode.
5. multi-element resonant converter according to claim 1, which is characterized in that the square-wave generator is inverse using half-bridge The bridge circuit on power transformation road, the square-wave signal duty ratio that half-bridge inversion circuit generates are 50%, and the half-bridge inversion circuit includes First switch tube S1, second switch S2, first switch tube S1Source electrode be connected in second switch S2Drain electrode.
6. multi-element resonant converter according to claim 5, which is characterized in that the first switch tube S1, second switch Pipe S2Using switch mosfet pipe or IGBT switching tube.
7. multi-element resonant converter according to claim 6, which is characterized in that the resonance circuit includes main inductance Lm、 Resonant inductance Lr, trapper, the transformer T includes primary side winding NpWith vice-side winding Ns, one end of trapper is connected to described Square-wave generator first switch tube S1Source electrode and second switch S2Drain electrode, the other end of trapper is connected to main inductance Lm One end and transformer T primary side winding NpSame Name of Ends, main inductance LmThe other end be connected in transformer T primary side winding NpIt is non-same Name end and resonant inductance LrOne end, resonant inductance LrThe other end be connected in and second switch S2Source electrode.
8. the multi-element resonant converter according to claim 4 or 7, which is characterized in that the trapper includes that series connection is humorous Shake slot and trapper capacitor Cp, series resonance slot and trapper capacitor CpIt is connected in parallel, the series resonance slot includes resonant capacitance Cr, trapper inductance Lp, the resonant capacitance CrWith trapper inductance LpIt is connected in series.
9. multi-element resonant converter according to claim 1, which is characterized in that the current rectifying and wave filtering circuit includes rectification Circuit and filter capacitor Co, the rectification circuit is by first diode D1, the second diode D2, third diode D3, the four or two pole Pipe D4It constitutes, first diode D1Anode and the second diode D2Cathode be connected in the transformer T vice-side winding NsIt is of the same name End, first diode D1Cathode be connected in third diode D3Cathode, output filter capacitor CoOne end and load RoOne End, transformer T vice-side winding NsNon-same polarity is connected in third diode D3Anode and the 4th diode D4Cathode, the four or two Pole pipe D4Anode be connected in the second diode D2Anode, output filter capacitor CoThe other end and load RoThe other end.
CN201811414160.5A 2018-11-26 2018-11-26 A kind of multi-element resonant converter Pending CN109361320A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111555627A (en) * 2020-05-09 2020-08-18 哈尔滨工业大学 Control method of high-order LCLCLCL direct current converter

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CN101335490A (en) * 2008-08-07 2008-12-31 英飞特电子（杭州）有限公司 Multiple-resonant soft switch converter
CN106787768A (en) * 2017-02-17 2017-05-31 珠海英搏尔电气股份有限公司 A kind of two-way full-bridge resonance DC/DC converter and its control method
CN106877673A (en) * 2017-03-13 2017-06-20 成都芯源***有限公司 Resonant converter and method thereof
EP3240174A1 (en) * 2016-04-27 2017-11-01 General Electric Company System and method for operating a power converter

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Publication number Priority date Publication date Assignee Title
CN101335490A (en) * 2008-08-07 2008-12-31 英飞特电子（杭州）有限公司 Multiple-resonant soft switch converter
EP3240174A1 (en) * 2016-04-27 2017-11-01 General Electric Company System and method for operating a power converter
CN106787768A (en) * 2017-02-17 2017-05-31 珠海英搏尔电气股份有限公司 A kind of two-way full-bridge resonance DC/DC converter and its control method
CN106877673A (en) * 2017-03-13 2017-06-20 成都芯源***有限公司 Resonant converter and method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111555627A (en) * 2020-05-09 2020-08-18 哈尔滨工业大学 Control method of high-order LCLCLCL direct current converter
CN111555627B (en) * 2020-05-09 2022-09-06 哈尔滨工业大学 Control method of high-order LCLCL direct current converter

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